Compression Machines With Non-Reversible Cycle TRIZ Cases

See how heating CO₂ refrigerant to maintain 430 kJ/kg enthalpy prevents dry ice formation durin

See how a heat medium relay unit separates refrigerant and heat medium loops to reduce leakage

See how a four-component HFO-R32 refrigerant blend achieves ≥85% R410A cooling capacity with ≤5

See how a CO₂ refrigeration system uses ambient temperature and pressure monitoring to control

See how segmented charging through pressure-controlled ports ensures complete distribution of s

See how dual-mode compressor frequency control prevents cooling medium freezing by adjusting ac

See how dual evaporator chambers with independent cooling systems enable continuous ultra-low t

See how a current-limiting apparatus suppresses HFO-1123 self-decomposition in heat cycles by c

See how a ternary refrigerant mixture of HFO-1132a, R32, and R1234ze achieves GWP ≤500 while ma

See how a compressor-free refrigeration system uses waste heat and passive ejector pumps to coo

See how a main-frame beverage maker integrates fermentation, cooling, and partition-based heat

See how monitoring oscillatory behavior in electrical current and evaporating temperature enabl

See how variable hydraulic diameter ratios in flow constrictions improve refrigerant distributi

See how intermediate plates and dual elastic-member layers isolate vibrations from multiple com

See how a control device detects user input errors by comparing set and calculated freezing tem

See how merging the gas cooler and fluid storage tank eliminates intercoolers and flash tanks i

See how a ternary HFO-R32 refrigerant mixture achieves GWP ≤250 and non-flammability while supp

See how a cold conduction sleeve wrapped around the evaporation pipe increases contact area and

See how warm refrigerant from the MT compressor suction side defrosts the LT evaporator without

See how a ternary HFO-HFC blend limits temperature glide below 6.5°C while achieving GWP ≤200 t

See how a switching valve group enables independent or series liquid-cooling loops to improve e

See how detachable cooling units with segmented insulation spaces enable easy evaporator mainte

See how a hybrid refrigeration system switches between chiller and natural cooling based on tem

See how a reversible plant uses self-service mechanical power from expanders to drive compresso

See how a dual-function first plate member with variable-length openings merges tube positionin

See how a bypass flow path with expansion valve routes secondary refrigerant around the cascade

See how replacing resistive heaters with thermoelectric modules enables continuous compressor o

See how asymmetric header openings with differentiated region lengths prevent brazing material

See how disconnecting centralized conduits and establishing modular circuits with R1234ze(E) re

See how a mixed refrigerant composition using HFO-1132(E), propane, and HFO-1132a achieves GWP

See how a composite base oil formulation balances low viscosity for efficiency with refrigerant

See how a bypass flow path and heat dissipating device prevent high-stage compressor vane jumpi

See how a reference liquid level position and processor-driven comparison enable early leakage

See how discharge-pressure feedback dynamically adjusts bypass expansion valves to balance heat

See how pre-filling source containers to 50-90% capacity maintains non-azeotropic refrigerant c

See how a heating device and adaptive expansion valve control maintain discharge superheat abov

See how dynamic sliding valve adjustment prevents over-compression in screw compressors by matc

See how an ejector-based single-stage cooling cycle uses flash tank separation and suction line

See how a mixed refrigerant using trans-1,2-difluoroethylene and difluoromethane in specific ra

See how a dual-compressor CO₂ cooling circuit with valve-controlled refrigerant routing achieve

See how paired ring plates acting as baffles stabilize oil surfaces during compressor startup t

See how pre-charging inert gas before refrigerant filling enables accurate pressure-based measu

See how sensor-based feedback and dynamic parameter control replace simple on/off thermostats t

See how a direct-drive screw compressor uses refrigerant as lubricant to eliminate oil separati

See how a rotary liquid piston compressor replaces Joule-Thomson valves to recapture pressure e

See how map-based dynamic control adjusts multiple ejector openings to prevent reverse flow and

See how interlaced microchannel heat exchangers with asymmetric row allocation enable multi-siz

See how a ternary HFO-1132(E), R1234ze, and R1234yf refrigerant mixture achieves low GWP and re

See how dynamic load distribution control monitors compressor states and adjusts module operati

See how a calculation module and adjustable valve dynamically control gaseous refrigerant suppl

Variable stroke control lets an inverter linear compressor match freezer and refrigerator temperature demand while cutting power use.

Recirculation and economizer ports stabilize part-load refrigerant flow in a two-stage centrifugal compressor, extending range and reducing surge.

Dynamic compressor RPM control uses battery and cooling plate temperatures to prevent overheating and extend battery cell life.

A plate distributor and baffle separator lower two-phase refrigerant dynamic pressure to improve flow uniformity and heat exchange.

Integrated TXVs inside each cold plate balance refrigerant flow, cut pressure loss, and improve temperature uniformity across discrete heat loads.

A matched expander and sub-compressor recover CO2 expansion power while allowing high-side pressure adjustment without bypass losses.

A mixed HFC-32, HFO-1234ze, and HFC-125 refrigerant lowers GWP while maintaining vapor-compression capacity, stability, and low flammability.

Nested comb-shaped evaporator pipes on inner side plates improve low-temperature evaporation, uniform storage cooling, and manufacturability.

A bypass valve uses expander suction pressure and temperature to limit discharge pressure, preventing overexpansion and stabilizing power recovery.

Continuous condenser fan operation vents leaked refrigerant from an ice-making machine, reducing fire risk and preserving operation during sensor failure.

An auxiliary compressor decouples economizer pressure and flow from the main cycle, improving off-design refrigeration efficiency and reducing liquid carry-over.

By controlling high-side pressure and radiator heat-transfer area, this cycle maintains cooling capacity when refrigerant nears supercritical overload.

A skirted protective cap redirects high-pressure refrigerant vent streams along the valve body to reduce personnel exposure during over-pressure relief.

Curved-corner evaporator pipe placement improves refrigerant evaporation and storage temperature uniformity while avoiding costly right-angle bends.

A sealed expansion device and distributor assembly creates uniform coil pressure drop and refrigerant flow while eliminating leakage-prone detachable joints.

D-shaped dual passages and pipe expansion stiffen flat heat transfer pipes, preserving fin contact while lowering airflow resistance.

A heat-source refrigerant bypass and recovery pipe cuts indoor refrigerant exposure, lowers piping complexity, and supports energy-saving operation.

Microchannel vapor and liquid refrigerant tubes improve heat transfer in less space while helping prevent liquid refrigerant from reaching the compressor.

Low-grade heat from the refrigeration cycle drives a heat engine that assists refrigerant compression and cuts compressor electricity use.

A dedicated defrosting tube bypasses reverse circulation to cut flow resistance, speed evaporator defrosting, and improve energy efficiency.

Dual compressors and separator-fed ejector flow improve pressure ratio control, cutting power use while raising refrigeration effect per mass flow.

A passive receiver captures excess liquid refrigerant in microchannel heat exchangers to cut subcooling and discharge pressure at high ambient conditions.

Bypass valves equalize pressure in stopped compressors, enabling faster restart without reducing indoor cooling or heating performance.

A low-hydroxyl polyvinyl ether oil keeps fluorinated refrigerants stable, limiting phase separation and sludge in car air conditioners.

Stored cold media cools condenser ambient fluid during peak demand, boosting power plant output without dedicated storage equipment.

A bypass tube and intake return path switch refrigerant around the intercooler to prevent liquid compression and cut heat radiation loss.

By extending the electric component unit downward across the fan shroud, this layout preserves heat exchanger area and maintenance access in a compact AC outdoor unit.

Phase-change thermal storage shifts refrigerator cooling to off-peak hours, cutting peak power use while maintaining temperature.

A shell-conforming subcooler with center and outer channels keeps vapor off the second tube bundle, improving subcooling and cutting refrigerant charge.

A removable partition and damper let bottom-freezer compartments combine or separate, while guided door cables support safe convertible control.

An added refrigerant vessel and switched valves vary evaporator charge with load to improve chiller efficiency while preventing compressor surge.

A retrofit control board switches blower speed from evaporator temperature feedback to cut blower energy while preserving cooling capacity.

A segregated refrigerant container and valve layout keeps high rest pressure out of the cooling circuit, cutting weight and mechanical load in aircraft food cooling.

Subcritical holes keep air trapped on fin surfaces, improve condensate drainage on horizontal tubes, and delay frost clogging.

A two-stage suction line heat exchanger repositions TXV sensing to cut evaporator superheat vapor and raise refrigeration capacity.

A wheeled, compartmentalized housing and splash-guarded condensation pan make this portable air conditioner easier to move without spills.

A vapor-compression and thermoelectric split cuts compressor cycling in vacuum-insulated refrigerators to reduce migration loss, noise, and energy use.

Radially narrow channels, partition walls, and turbulence promotion boost heat transfer for compact power modules while limiting pressure loss.

Interconnected evaporators, condensers, and refrigerant circuits keep modular chillers using full heat-transfer area during partial-load operation.

An actuator shifts the motive nozzle to match changing conditions, improving ejector pressure recovery and refrigeration COP.

By combining service access and shut-off functions in one valve block, this case cuts refrigerant leak paths while keeping tool compatibility.

Periodic vapor refrigerant surges warm the evaporator inlet above the dew point, cutting frost buildup and defrost energy use.

Converting non-linear suction pressure into equivalent temperature lets refrigeration PID control stay stable and efficient across wide operating ranges.

Modular inverters let a multi-compressor chiller adjust speed and compressor count for load and high ambient conditions while avoiding full shutdowns.

A capped control mode limits compressor capacity and suction-side pressure to prevent liquid refrigerant carryover without added separators.

Different multichannel tube layouts handle vapor and liquid refrigerant separately to improve heat transfer and reduce pressure drop.

Direct coolant evaporation and vapor recompression crystallize organic compounds at low temperature while cutting refrigeration energy and equipment cost.

A controlled judging mode holds superheat and evaporation pressure steady to assess refrigerant charge accurately despite varying loads and piping.

Multiple temperature sensors and microprocessor control adjust compressor and fan speeds to hold compartment temperatures with lower energy use.

Different tube spacings for vapor and liquid refrigerant improve airflow, fin use, and heat transfer across multichannel exchangers.

Work-doing CO2 expansion boosts vehicle air conditioning COP at high ambient temperatures while lowering operating pressure in a compact reversible circuit.

A liquid refrigerant pump and mode switching enable free cooling in cold weather, avoiding refrigerant migration and cutting compressor energy use.

A vapor-compression evaporator creates a closed-loop airflow path to cool high-power electronics without extreme airflow or clean-room limits.

Switching refrigerant between accumulators when the compressor stops cuts refrigerator noise, limits pressure differences, and protects compressor performance.

A cascade freezer uses nonazeotropic mixed refrigerants to reach -150°C while maintaining oil return and avoiding ozone-depleting refrigerants.

A non-azeotropic mixed refrigerant lets a single circuit reach below −85°C while avoiding ozone damage, combustion risk, and multistage complexity.

Timed compressor modes let users silence a refrigerator temporarily or force rapid cooling without unplugging the appliance.

Adaptive PI gains tied to evaporator temperature error improve swash-plate compressor response while limiting fluctuation and overshoot.

By averaging compressor isentropic efficiency against a threshold, this case enables automated fault detection and better refrigeration energy management.

Dynamic compressor cycling limits balance discharge air temperature variation with cycling frequency to improve comfort and clutch durability.

Variable-speed compressor and mixer control matches heating or cooling power to batch size, cutting energy waste while keeping food mixture quality stable.

Load sensing at compressor outputs lets an HVAC controller identify compressor type, auto-configure control, and block operation on wiring errors.

Selective isolation of condenser circuits maintains refrigerant head pressure in low ambient HVAC operation, preventing icing without added piping.

Internal shells, baffles, and elbows improve vapor-liquid separation in heat pump flash tanks, cutting turbulence and liquid carryover.

Using current and discharge temperature signals, this case shows how a compressor distinguishes high-side and low-side faults with fewer sensors.

A brief reverse-mode start-up diverts liquid refrigerant to the outdoor coil, preventing compressor flooded starts without an accumulator.

Heating the fresh food compartment after long off periods keeps an absorption refrigerator running enough to protect freezer cooling in winter.

A dual-glide freezer drawer and upper bin layout improves access to buried items without requiring multiple drawers to be pulled out in sequence.

A single close-coupled starter box on the chiller cuts conduit and wiring complexity while saving equipment room space and reducing heat.

Indirect heat exchange chills hot brewed beverages on demand in seconds or minutes without dilution, stale storage, or flavor loss.

Concentric tubes with different flow lengths create multiple resonance frequencies to damp compressor pressure pulsations across a broad range.

By raising condenser outlet target temperature during oil return, this control approach limits excess heating and pressure while keeping refrigerant flow stable.

Placing the intercooler downstream of the indoor heat exchanger enables reheat and discharge-temperature control without extra circuitry.

Unsaturated fatty acid ester oil captures hydrogen fluoride from HFO refrigerant breakdown, limiting corrosion and motor insulation damage.

A desuperheating unit adds secondary cooling to transcritical CO2 refrigerant, improving efficiency and cooling in high ambient temperatures.

A single CO2 economizer with dual flowpaths replaces separate units, saving space and cost while supporting frozen and chilled transport cooling.

A thermally coupled R32 subcooling circuit cuts main compressor power and flow rate while lowering GWP in R125/R143A refrigeration.

Stored valve-control algorithms and a fast cooling bypass reduce overshoot and instability during rapid temperature-level changes.

A gravity-fed banking circuit stores and releases cooling capacity for faster single-chamber thermal cycling without oversized refrigeration.

A turbocompressor and heat-exchanger branch recovers bleed-off energy to cut main compressor load and raise refrigeration efficiency.

Pressure and ambient sensing infer cutout switch status to lock out HVAC compressor short-cycling and reduce wear under abnormal conditions.

Pressure sensing with ambient and mode-based cutout logic avoids false trips, reduces short-cycling, and protects HVAC compressor life.

Adjustable gas pressure collapses a flexible beverage receptacle inside a refrigerated container, improving dispensing and temperature control.

Temporarily raising compressor pressure and temperature limits enables rapid cooldowns and avoids shutdowns during high ambient conditions.

Calculates dissolved refrigerant in compressor oil from operating temperatures and pressure to improve air-conditioner charge judgment accuracy.

Load sensing identifies the installed compressor type and wiring state so the HVAC controller can apply the right mode and block unsafe operation.

Variable-speed compressor control in a two-stage cascade refrigerator improves temperature uniformity, efficiency, peak-load recovery, and noise management.

Flow mixers in the evaporator manifold blend liquid and vapor refrigerant to prevent channel maldistribution and improve heat absorption.

Cycling the evaporator fan with compressor timing cuts vending machine cooling energy use while keeping products within temperature limits.

Pressure-triggered purge control removes non-condensable gas from an absorber to limit corrosion and maintain absorption system performance.

A curved airflow guide and cross flow fan separate hot and cool air in the machine room, cutting resistance and improving condenser heat exchange.

Linked control modules coordinate compressors and condenser fans across parallel condensing units to balance capacity and cut energy waste.

A manifold forms a liquid pool and routes liquid and vapor refrigerant into separate multichannel tubes to improve evaporator heat transfer.

A polyalkylene glycol acid scavenger neutralizes minute acids in refrigeration oil to prevent sludge, gasket peeling, and friction losses.

Temperature-based bypass valve control limits startup refrigerant inflow from the accumulator to prevent compressor oil dilution and discharge.

Inclined passages on a central suction pipe create swirl mixing, shortening the ejector mixing portion while maintaining pressure recovery.